/**
 * Note: The returned array must be malloced, assume caller calls free().
 */
int* twoSum(int* nums, int numsSize, int target, int* returnSize) {
    for(int i = 0; i < numsSize;i++ ){
        for(int j = i+1;j<numsSize ;j++){
            if(nums[i]+nums[j]==target){
                int* ret = (int*)malloc(sizeof(int)*2); 
                ret[0] = i;
                ret[1] = j;
                *returnSize = 2;
                return ret;
            }
        }
    }
    returnSize = 0;
    return NULL;
}